A Answers (2)
Mehmet Oz, MD, Cardiology, answeredLangerhans cells exist on the surface of the skin. They help to protect you by keeping dangerous microbes from entering your body. Langerhans cells do this in two very different ways: by protecting your skin from infection and also by stimulating allergic reactions.
Ellen Marmur, MD, Dermatology, answered
Sensing any kind of danger in the skin, the Langerhans cells, located in the epidermis and the dermis, are like the air traffic controllers of the immune system. They send out special agents- immune cells such as T cells and B cells - to capture foreign invaders such as bacteria and viruses, and fight off injuries like cuts and scrapes. They constantly monitor the environment of the skin for unsafe situations and send immune cells on their missions to bring back information about any trespasser. Then the body can decide to amass a great force of inflammatory cells to fight off the attacker by creating an allergic reaction or forming scar tissue.
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